This article was previously published under Q275168
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When a COM server object is registered as single use and is also using the single threaded apartment model, attempts by a client to create a new instance may get delayed.
Windows 2000 sends a create instance request to a previously created instance of the server, even though it was created as single use. If the server is busy (out of its message loop) it could cause a delay.
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.